Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 0), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
A150837
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 0), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =137a(5) =603a(6) =2733a(7) =12548a(8) =58366a(9) =273838a(10) =1294196a(11) =6151513a(12) =29378090a(13) =140853763a(14) =677586477a(15) =3268830837a(16) =15808422237a(17) =76615362124a(18) =372015952802
External references
- oeis: A150837